A258202 Natural numbers n that have the property that starting from k = n, the fixed point of the map k -> floor(tan(k)) is strictly positive, while the smallest number encountered during the iteration is strictly negative.

121, 143, 476, 498, 831, 853, 1076, 1186, 1208, 1541, 1563, 1786, 1896, 1918, 2251, 2273, 2606, 2628, 2961, 2983, 3316, 3338, 3561, 3671, 3693, 4026, 4048, 4381, 4403, 4736, 4758, 5091, 5113, 5336, 5446, 5468, 5801, 5823, 6156, 6178, 6511, 6533, 6866, 6888, 7221, 7243, 7576, 7598, 7821, 7931, 7953, 8286, 8308, 8641, 8663, 8996, 9018

Offset

1,1

Comments

Numbers n for which A258021(n) > 0 and A258201(n) < 0.

Links

Antti Karttunen, Table of n, a(n) for n = 1..10000

Prog

(Scheme, with Antti Karttunen's IntSeq-library)
(define A258202 (MATCHING-POS 1 1 (lambda (n) (and (> (A258021 n) 0) (< (A258201 n) 0)))))

Crossrefs

Complement of A258203 in A258024.

Cf. A258021, A258201.

Sequence in context: A062649 A206288 A287390 * A242372 A182072 A262514

Adjacent sequences: A258199 A258200 A258201 * A258203 A258204 A258205

Keyword

nonn

Author

Antti Karttunen, May 26 2015

Status

approved